Original scientific paper

Composite Films of Metal Hexacyanoferrate and Poly (1,8-diaminonaphthaline) Derivatives: Electrosynthesis and Properties

A. A. Hathoot ; Laboratory of Electrochemistry, Chemistry Department, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt
D. Sherif ; Laboratory of Electrochemistry, Chemistry Department, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt
M. Abdel-Azzem ; Laboratory of Electrochemistry, Chemistry Department, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt

Abstract

The details of a potentiodynamic preparation method for a composite nickel(II) and copper(II) hexacyanoferrate (MeHcF) and poly[8-(3-acetylimino-6-methyl-2,4-dioxopyran)-1-aminonaphthaline] (PAMDAN) on a platinum electrode, (Pt |PAMDAN|MeHcF) are reported. The cyclic voltamograms recorded
the direct deposition and growth of inner layer (PAMDAN) and the outer layer (MeHcF) from their solutions. The two composite electrodes show an improvement in the redox response. The voltammetric characteristics of the composite modified electrodes were also investigated in presence of different alkali
metal cations (Li+, Na+, K+ and NH4+). The heterogeneous electron transfer processes involving the composite
and their stability were examined by subjecting the system to the long term cyclic voltammetric potential cycling in 0.2 M NaCl electrolyte also after exposing the modified electrode to air for about 48 h then cycled in 0.2 M NaCl solution. Bilayer composite electrodes exhibit higher ionic conductivity, higher
stability in comparison with pure inorganic (MeHcF) films. The inner electroactive polymer chains in the film cause enhancement in the electric conductivity of the composite electrodes.

Keywords

composite electrode; cyclic voltammetry; electropolymerization; electrodeposition; hybrid films; modified electrode; prussian blue analogues

Hrčak ID:

56017

URI

https://hrcak.srce.hr/56017

Publication date:

15.7.2010.

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